Unit 4 the fundamentals of computer Hardware Text 1 Organization of Computer System Components Now lets look at our computer definition: A computer is a fast and accurate system. It is organized to accept, store, and process data and produce output results. This section will explain why a computer is a system and how a computer system is organized Key elements in a computer sy stem include memory, input devices, central processing unit iNput devices Computer systems use many devices for input purpose. Some input devices allow direct human/machine communication, while some require data to be recorded on an input medium first Devices that read data magnetically recorded are popular. Direct input devices include touch screen The heart of any computer system is the central processing unit(CPU). There are two main sections found in the CPU of a typical personal computer system the arithmetic-logic section · the control sectio These sections are found in CPUs of all sizes (3)Output devices Like input devices, output devices are instruments of interpretation and communication etween humans and computer systems. These devices convert output results from the Cpu into a form that can be used by people In personal computer systems, display screen and desktop printers are popular output devices. The input/output devices are sometimes called peripheral devices. Because these devices are not a part of the Cpu, they are often located near it 参考译文 计算机系统的组织结构 在让我们来看一下计算机的定义:计算机是一种快速、精确的系统,这一系统用于接收 存储、处理数据,并可以产生输出结果。本节将要说明为什么计算机是一个系统以及计算机 系统是如何组成的。 计算机系统的主要部件包括存储器、输入设备、中央处理器和输出设备。 1)输入设备 计算机系统使用多种输入设备。一些输入设备可直接进行人机通信,而另一些则要求首Unit 4 the Fundamentals of Computer Hardware Text 1 Organization of Computer System Components Now let's look at our computer definition: A computer is a fast and accurate system. It is organized to accept, store, and process data and produce output results. This section will explain why a computer is a system and how a computer system is organized. Key elements in a computer system include memory, input devices, central processing unit and output devices. (1) Input devices Computer systems use many devices for input purpose. Some input devices allow direct human / machine communication, while some require data to be recorded on an input medium first. Devices that read data magnetically recorded are popular. Direct input devices include: • keyboard • mouse • input pen • touch screen • microphone (2) Central processing unit The heart of any computer system is the central processing unit (CPU). There are two main sections found in the CPU of a typical personal computer system: • the arithmetic-logic section • the control section These sections are found in CPUs of all sizes. (3) Output devices Like input devices, output devices are instruments of interpretation and communication between humans and computer systems. These devices convert output results from the CPU into a form that can be used by people. In personal computer systems, display screen and desktop printers are popular output devices. The input/output devices are sometimes called peripheral devices. Because these devices are not a part of the CPU, they are often located near it. 参考译文 计算机系统的组织结构 在让我们来看一下计算机的定义：计算机是一种快速、精确的系统，这一系统用于接收、 存储、处理数据，并可以产生输出结果。本节将要说明为什么计算机是一个系统以及计算机 系统是如何组成的。 计算机系统的主要部件包括存储器、输入设备、中央处理器和输出设备。 (1) 输入设备 计算机系统使用多种输入设备。一些输入设备可直接进行人机通信，而另一些则要求首